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1 • i <br /> 1 <br /> • Contaminant Mass Balance Manteca Unified School District <br /> ' Louise Road Agricultural Building ..» <br /> ContgV- ~Avg Cntm"-Dmtr Radius Height Vol (cu ft) Cntm vol cu ft <br /> 150 150 \ 9 45 2 127 17 000015 <br /> 50 0100 12 6 5 43803 0043803 <br /> 0 25 15 75 9 1151 595 0 023032 - f <br /> _ Total vol 0066985 r <br /> Diesel Mass <br /> cu ft wt h2o(lb)/wt diesel sp �'7 _Total mass <br /> ' 0066985 4 179858 2 9259 lbs J 1 1 329955 kg <br /> r' <br /> ' 14 - Ass_umptions, Parameters, and Calculations in Risk Assessment —Groundwater <br /> contamination associated with the leaking underground storage tank was not confirmed <br /> The onsite domestic well did not contain detectable concentrations of hydrocarbon <br /> ' contaminants Aromatic hydrocarbons, detected in the monitoring wells at concentrations <br /> below all established water quality goals, appear to be sourced from other onsite <br /> activities The site meets the Regional Boards draft "vadose zone low risk criteria" of <br /> ' source removal, lack of threat to the waters of the state, and no significant risk to human <br /> health and safety <br /> '• 15 - Rational Why the Site Conditions will not Adversely Impact the Waters of the State <br /> - See item 14 <br /> 1 16 - Waste Extraction or TCLP Analytical Results - Analysis by Waste Extraction or <br /> TCLP was not required by San Joaquin County Environmental Health Department <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> i <br /> 1 <br /> 1 <br />